英语 高三 词汇题 较难

Unit 2 Grammar: Non-finite Verbs in Context — 英语词汇题

冀教版·英语(高中) 英语选择性必修 第二册 AI 三重审校通过

题目
Before the science museum opened, the volunteers were asked ___ (check) every label. The curator insisted on ___ (keep) the emergency exits clear. The display cases ___ (repair) the previous evening were ready for use, but visitors were not allowed ___ (touch) the exhibits.